class_docstr: Base class for WK3l datasets (WK3l-15k, WK3l-120k, CN3l).
code: def _load_graph(self, side: EASide) -> TriplesFactory:  # noqa: D102
      logger.info(f"Loading graph for side: {side}")
      df = self._load_df(key=side, names=COLUMN_LABELS)
      # create triples factory
      return TriplesFactory.from_labeled_triples(
          triples=df.values,
          metadata=dict(graph_pair=self.graph_pair, side=side),
      )
  
imports: import itertools
  import logging
  import pathlib
  from abc import ABC
  from typing import ClassVar, Iterable, Literal, Mapping, Tuple, Union
  import click
  import pandas
  from docdata import parse_docdata
  from more_click import verbose_option
  from pystow.utils import read_zipfile_csv
  from .base import EADataset
  from ...constants import COLUMN_LABELS, PYKEEN_DATASETS_MODULE
  from ...triples import TriplesFactory
  from ...typing import EA_SIDE_LEFT, EA_SIDE_RIGHT, EA_SIDES, LABEL_HEAD, LABEL_TAIL, EASide
label_desc: Use image node_id 5 for calling the MTransEDataset obj's underlying member method code with example usage: obj._load_graph(side) and returns: TriplesFactory